PT-2018-3026 · Linux+5 · Linux Kernel+5
Brian Belleville
·
Published
2018-03-07
·
Updated
2023-02-15
·
CVE-2018-7755
CVSS v3.1
5.5
Medium
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
Name of the Vulnerable Software and Affected Versions
Linux kernel versions prior to 4.15.8
Description
The issue is related to the
fd locked ioctl function in the Linux kernel, specifically in the floppy driver. It allows an attacker to obtain a kernel pointer by sending the FDGETPRM ioctl, which can be used to discover the location of kernel code and data, potentially bypassing kernel security protections such as KASLR. This could lead to the disclosure of protected information.Recommendations
For Linux kernel versions prior to 4.15.8, update to version 4.15.8 or later to resolve the issue. As a temporary workaround, consider disabling the floppy driver to minimize the risk of exploitation. Restrict access to the
fd locked ioctl function in the floppy driver to prevent potential attacks. Avoid using the FDGETPRM ioctl until the issue is resolved.Exploit
Fix
Information Disclosure
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Centos
Linux Kernel
Red Hat
Suse
Ubuntu